You can blame the full Moon!
Researchers from Basel University in Switzerland have conducted a study that found evidence of a "lunar influence" on sleep patterns. Volunteers of the study slept two separate nights at a lab under close observation. They were unable to see the Moon from their beds but the study showed that the volunteers took five minutes longer to fall asleep and slept for 20 minutes less when there was a full Moon. Brain activity related to deep sleep also dropped by nearly a third around the full Moon.
The researchers were unable to determine why the full Moon had such an effect on human biology but the results seem undeniable. So the next time you have a bad night sleep, if there is a full Moon, you know who to blame.